:root {
  --bg1: #0f1923;
  --bg2: #1a2a3a;
  --bg3: #0d3320;
  --panel: rgba(255,255,255,0.045);
  --line: rgba(125,242,142,0.14);
  --green: #7df28e;
  --green-dim: #4ec96a;
  --violet: #c9a0ff;
  --yellow: #ffd977;
  --pink: #ff9db8;
  --red: #ff7d7d;
  --text: #eef5ee;
  --muted: #9fb4a6;
  --radius: 16px;
}
* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, "Noto Sans", sans-serif;
  background: linear-gradient(135deg, var(--bg1) 0%, var(--bg2) 45%, var(--bg3) 100%) fixed;
  color: var(--text);
  line-height: 1.6;
  min-height: 100vh;
}
a { color: var(--green); text-decoration: none; }
h2 { font-size: clamp(1.6rem, 3.5vw, 2.3rem); letter-spacing: -0.02em; margin-bottom: 28px; }
.muted { color: var(--muted); }
.small { font-size: 0.85rem; }
.hidden { display: none !important; }

.nav {
  position: sticky; top: 0; z-index: 50;
  display: flex; align-items: center; justify-content: space-between;
  padding: 14px clamp(16px, 4vw, 48px);
  background: rgba(15,25,35,0.82);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--line);
}
.brand { display: flex; align-items: center; gap: 10px; }
.brand-mark {
  width: 34px; height: 34px; border-radius: 10px;
  background: linear-gradient(135deg, var(--green) 0%, #2e8b57 100%);
  color: #08120b; font-weight: 900; font-size: 0.95rem;
  display: grid; place-items: center; letter-spacing: -0.03em;
}
.brand-name { font-weight: 800; font-size: 1.15rem; color: var(--text); }
.accent { color: var(--green); }
.nav-links { display: flex; align-items: center; gap: clamp(12px, 2vw, 26px); }
.nav-links a:not(.btn) { color: var(--muted); font-size: 0.92rem; transition: color .2s; }
.nav-links a:not(.btn):hover { color: var(--text); }
@media (max-width: 720px) { .nav-links a:not(.btn) { display: none; } }

.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  border-radius: 999px; font-weight: 700; cursor: pointer;
  border: 1px solid transparent; transition: transform .15s, box-shadow .2s, background .2s;
  font-size: 0.95rem; padding: 10px 22px;
}
.btn-sm { padding: 7px 16px; font-size: 0.85rem; }
.btn-lg { padding: 14px 32px; font-size: 1.05rem; }
.btn-primary { background: linear-gradient(135deg, var(--green), #34b45a); color: #07130a; box-shadow: 0 6px 22px rgba(125,242,142,0.28); }
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 10px 30px rgba(125,242,142,0.4); }
.btn-ghost { background: rgba(255,255,255,0.06); color: var(--text); border-color: rgba(255,255,255,0.18); }
.btn-ghost:hover { background: rgba(255,255,255,0.12); }
.btn-dark { background: #0b141d; color: var(--green); border-color: var(--green); }
.btn.wide { width: 100%; margin-top: 10px; }

.hero {
  position: relative; text-align: center;
  padding: clamp(60px, 10vw, 120px) 20px 40px;
  max-width: 1100px; margin: 0 auto;
}
.hero-badge {
  display: inline-block; padding: 6px 16px; border-radius: 999px;
  border: 1px solid var(--line); color: var(--green);
  font-size: 0.82rem; font-weight: 600; letter-spacing: 0.04em; margin-bottom: 22px;
  background: rgba(125,242,142,0.06);
}
.hero h1 { font-size: clamp(2.4rem, 7vw, 4.6rem); line-height: 1.05; letter-spacing: -0.03em; font-weight: 900; }
.grad { background: linear-gradient(90deg, var(--green), var(--yellow)); -webkit-background-clip: text; background-clip: text; color: transparent; }
.hero-sub { max-width: 640px; margin: 22px auto 30px; color: var(--muted); font-size: 1.05rem; }
.hero-cta { display: flex; gap: 14px; justify-content: center; flex-wrap: wrap; }
.hero-meta { margin-top: 18px; color: var(--muted); font-size: 0.85rem; }
.hero-bubble {
  position: absolute; max-width: 240px; text-align: left;
  background: var(--panel); border: 1px solid var(--line);
  border-radius: var(--radius); padding: 14px 18px; font-size: 0.85rem;
}
.bubble-left { left: 0; top: 40%; transform: rotate(-3deg); }
.bubble-right { right: 0; top: 55%; transform: rotate(3deg); }
@media (max-width: 980px) { .hero-bubble { display: none; } }
.char-tag { font-size: 0.68rem; font-weight: 900; letter-spacing: 0.12em; margin-bottom: 6px; }
.char-tag.boke { color: var(--green); }
.char-tag.tsun { color: var(--violet); }

.ticker {
  overflow: hidden; white-space: nowrap; border-block: 1px solid var(--line);
  padding: 12px 0; color: var(--muted); font-family: ui-monospace, Consolas, monospace;
  font-size: 0.85rem; background: rgba(0,0,0,0.25);
}

.section { max-width: 1100px; margin: 0 auto; padding: clamp(56px, 8vw, 96px) 20px; }
.section.alt { max-width: none; background: rgba(0,0,0,0.22); border-block: 1px solid rgba(255,255,255,0.04); }
.section.alt > * { max-width: 1100px; margin-inline: auto; }

.grid { display: grid; gap: 18px; }
.grid-3 { grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); }
.grid-2 { grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); }
.card {
  background: var(--panel); border: 1px solid var(--line);
  border-radius: var(--radius); padding: 26px;
  transition: transform .2s, border-color .2s;
}
.card:hover { transform: translateY(-4px); border-color: rgba(125,242,142,0.4); }
.card h3 { margin: 14px 0 8px; font-size: 1.1rem; }
.card p { color: var(--muted); font-size: 0.92rem; }
.card-ico {
  width: 46px; height: 46px; border-radius: 12px; display: grid; place-items: center;
  font-weight: 900; font-size: 0.85rem; letter-spacing: -0.02em;
}
.i-green { background: rgba(125,242,142,0.14); color: var(--green); }
.i-yellow { background: rgba(255,217,119,0.14); color: var(--yellow); }
.i-pink { background: rgba(255,157,184,0.14); color: var(--pink); }
.i-blue { background: rgba(125,180,255,0.14); color: #8ab8ff; }
.i-violet { background: rgba(201,160,255,0.14); color: var(--violet); }
.i-teal { background: rgba(120,230,210,0.14); color: #78e6d2; }

.exam-row { display: flex; gap: 14px; flex-wrap: wrap; justify-content: center; }
.exam-chip {
  display: block; min-width: 190px; padding: 20px 24px; border-radius: var(--radius);
  background: var(--panel); border: 1px solid var(--line); color: var(--text);
  transition: transform .2s, border-color .2s;
}
.exam-chip strong { display: block; font-size: 1.05rem; margin-bottom: 4px; }
.exam-chip span { color: var(--muted); font-size: 0.85rem; }
.exam-chip:not(.soon):hover { transform: translateY(-3px); border-color: var(--green); }
.exam-chip.soon { opacity: 0.45; cursor: default; }
.center-note { text-align: center; color: var(--muted); margin-top: 26px; font-size: 0.92rem; }

.char-card {
  background: var(--panel); border: 1px solid var(--line);
  border-radius: var(--radius); padding: 30px; text-align: center;
}
.boke-card { border-top: 3px solid var(--green); }
.tsun-card { border-top: 3px solid var(--violet); }
.char-avatar {
  width: 88px; height: 88px; border-radius: 50%;
  display: grid; place-items: center; margin: 0 auto 16px;
  font-size: 2rem; font-weight: 900; color: #08120b;
}
.zunda-bg { background: radial-gradient(circle at 30% 25%, #a5f5b0, #3fae5c); }
.metan-bg { background: radial-gradient(circle at 30% 25%, #e3ccff, #9a6fd6); }
.char-card p { color: var(--muted); font-size: 0.92rem; }
.char-card .jp { color: var(--muted); font-size: 0.8rem; margin-bottom: 10px; }
.credit-note { text-align: center; color: var(--muted); font-size: 0.85rem; margin-top: 24px; }

.roadmap { list-style: none; display: grid; gap: 12px; max-width: 720px; }
.roadmap li {
  display: flex; gap: 18px; align-items: flex-start;
  background: var(--panel); border: 1px solid var(--line);
  border-radius: var(--radius); padding: 18px 22px;
}
.ep {
  flex-shrink: 0; font-size: 0.7rem; font-weight: 900; letter-spacing: 0.08em;
  padding: 5px 12px; border-radius: 999px; margin-top: 3px;
}
.ep.live { background: rgba(125,242,142,0.15); color: var(--green); }
.ep.next { background: rgba(255,217,119,0.13); color: var(--yellow); }
.ep.plan { background: rgba(255,255,255,0.07); color: var(--muted); }
.roadmap small { display: block; color: var(--muted); }

.cta-band {
  text-align: center; padding: clamp(70px, 9vw, 110px) 20px;
  background: radial-gradient(ellipse at center, rgba(125,242,142,0.09), transparent 65%);
}
.cta-band p { color: var(--muted); margin: 10px 0 26px; }

.footer { border-top: 1px solid var(--line); padding: 44px clamp(16px, 4vw, 48px) 28px; background: rgba(0,0,0,0.35); }
.footer-grid { display: grid; grid-template-columns: 1.2fr 1fr 1fr; gap: 30px; max-width: 1100px; margin: 0 auto; }
@media (max-width: 760px) { .footer-grid { grid-template-columns: 1fr; } }
.footer-brand { font-size: 1.2rem; font-weight: 800; margin-bottom: 8px; }
.footer-h { font-weight: 700; margin-bottom: 8px; font-size: 0.92rem; }
.footer-bottom { text-align: center; margin-top: 30px; border-top: 1px solid rgba(255,255,255,0.05); padding-top: 18px; }
.footer.slim { text-align: center; padding: 18px; }

.app-body { background: linear-gradient(160deg, var(--bg1) 0%, var(--bg2) 50%, var(--bg3) 100%) fixed; }
.app-nav { justify-content: space-between; }
.app-nav-right { display: flex; gap: 10px; align-items: center; }
.stat-chip {
  font-size: 0.8rem; font-weight: 700; padding: 6px 14px; border-radius: 999px;
  background: var(--panel); border: 1px solid var(--line); color: var(--green);
}
.app-main {
  display: grid; grid-template-columns: 300px 1fr; gap: 22px;
  max-width: 1180px; margin: 0 auto; padding: 26px clamp(14px, 3vw, 32px) 60px;
  align-items: start;
}
@media (max-width: 900px) { .app-main { grid-template-columns: 1fr; } }
.side-col { display: grid; gap: 18px; position: sticky; top: 76px; }
@media (max-width: 900px) { .side-col { position: static; } }
.panel {
  background: var(--panel); border: 1px solid var(--line);
  border-radius: var(--radius); padding: 22px;
}
.panel h3 { font-size: 0.95rem; margin-bottom: 12px; letter-spacing: 0.01em; }

.track-list { display: grid; gap: 8px; }
.track {
  display: flex; justify-content: space-between; align-items: baseline;
  width: 100%; text-align: left; cursor: pointer;
  background: rgba(255,255,255,0.04); color: var(--text);
  border: 1px solid transparent; border-radius: 12px; padding: 12px 16px;
  transition: border-color .2s, background .2s; font-size: 0.95rem;
}
.track small { color: var(--muted); font-size: 0.75rem; }
.track:hover { background: rgba(255,255,255,0.09); }
.track.active { border-color: var(--green); background: rgba(125,242,142,0.08); }
.track.mock.active { border-color: var(--yellow); background: rgba(255,217,119,0.07); }

.smart-toggle {
  display: flex; gap: 10px; align-items: center; margin-top: 14px;
  font-size: 0.85rem; color: var(--muted); cursor: pointer;
}
.smart-toggle input { accent-color: var(--green); width: 17px; height: 17px; }

.tip-box { display: flex; gap: 14px; align-items: flex-start; }
.tip-avatar {
  width: 52px; height: 52px; border-radius: 50%; flex-shrink: 0;
  display: grid; place-items: center; font-size: 1.4rem; font-weight: 900; color: #08120b;
}
.tip-box p { font-size: 0.88rem; color: var(--muted); }

.leaderboard { list-style: none; display: grid; gap: 6px; counter-reset: rank; }
.leaderboard li {
  display: flex; justify-content: space-between; gap: 10px;
  font-size: 0.86rem; padding: 8px 12px; border-radius: 10px;
  background: rgba(255,255,255,0.04);
}
.leaderboard li::before { content: "#" counter(rank); counter-increment: rank; color: var(--muted); font-weight: 700; min-width: 34px; }
.leaderboard li.top1 { border: 1px solid rgba(255,217,119,0.4); }
.leaderboard li.empty { color: var(--muted); justify-content: center; }
.leaderboard li.empty::before { content: none; }

.quiz-panel { min-height: 420px; display: flex; flex-direction: column; }
.quiz-head { display: flex; align-items: center; gap: 12px; margin-bottom: 18px; flex-wrap: wrap; }
.topic-tag {
  font-size: 0.72rem; font-weight: 800; letter-spacing: 0.06em;
  background: rgba(201,160,255,0.12); color: var(--violet);
  padding: 5px 12px; border-radius: 999px;
}
.video-link { font-size: 0.72rem; font-weight: 700; color: var(--yellow); }
.video-link.off { color: var(--muted); font-weight: 400; }
.progress-text { margin-left: auto; color: var(--muted); font-size: 0.85rem; font-variant-numeric: tabular-nums; }
#q-text { font-size: clamp(1.15rem, 2.4vw, 1.5rem); line-height: 1.45; margin-bottom: 22px; font-weight: 700; }

.options { display: grid; gap: 10px; }
.opt {
  text-align: left; width: 100%; cursor: pointer; font-size: 0.98rem;
  background: rgba(255,255,255,0.045); color: var(--text);
  border: 1px solid rgba(255,255,255,0.1); border-radius: 12px; padding: 14px 18px;
  transition: border-color .15s, background .15s;
}
.opt:hover:not(:disabled) { border-color: var(--green); background: rgba(125,242,142,0.06); }
.opt:disabled { cursor: default; opacity: 0.85; }
.opt.correct { border-color: var(--green); background: rgba(125,242,142,0.14); font-weight: 700; }
.opt.wrong { border-color: var(--red); background: rgba(255,125,125,0.1); }
.opt .key { display:inline-grid; place-items:center; width:24px; height:24px; border-radius:7px; margin-right:10px; background:rgba(255,255,255,0.08); font-size:0.75rem; font-weight:800; }

.feedback { margin-top: 20px; animation: rise .3s ease; }
@keyframes rise { from { opacity: 0; transform: translateY(8px); } to { opacity: 1; transform: none; } }
.feedback p { font-size: 0.98rem; }
.metan-note {
  margin-top: 14px; padding: 14px 16px; border-left: 3px solid var(--violet);
  background: rgba(201,160,255,0.07); border-radius: 0 12px 12px 0;
}
.metan-note p:last-child { font-size: 0.9rem; color: var(--muted); }
.feedback .btn { margin-top: 18px; }

.result-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 12px; margin: 22px 0; }
.result-stat { text-align: center; background: rgba(255,255,255,0.04); border-radius: 12px; padding: 18px 10px; }
.result-stat span { display: block; font-size: 1.9rem; font-weight: 900; color: var(--green); font-variant-numeric: tabular-nums; }
.result-stat small { color: var(--muted); }
#weak-topics { margin-bottom: 18px; }
.weak-tag {
  display: inline-block; font-size: 0.78rem; margin: 3px 6px 3px 0;
  padding: 5px 12px; border-radius: 999px;
  background: rgba(255,125,125,0.1); color: var(--red); border: 1px solid rgba(255,125,125,0.25);
}
.save-row { display: flex; gap: 10px; margin-bottom: 18px; }
.save-row input {
  flex: 1; background: rgba(255,255,255,0.06); border: 1px solid rgba(255,255,255,0.14);
  color: var(--text); border-radius: 999px; padding: 10px 18px; font-size: 0.92rem; outline: none;
}
.save-row input:focus { border-color: var(--green); }
.result-actions { display: flex; gap: 12px; }

.modal {
  position: fixed; inset: 0; z-index: 90; display: grid; place-items: center;
  background: rgba(5,10,15,0.72); backdrop-filter: blur(4px);
}
.modal-box { position: relative; width: min(400px, calc(100vw - 36px)); }
.modal-close {
  position: absolute; top: 10px; right: 14px; background: none; border: none;
  color: var(--muted); font-size: 1.6rem; cursor: pointer;
}
.pd-display {
  font-size: 3.4rem; font-weight: 900; text-align: center;
  font-variant-numeric: tabular-nums; color: var(--green);
  letter-spacing: 0.02em; margin: 18px 0 2px;
}
.pd-phase { text-align: center; color: var(--muted); font-size: 0.85rem; margin-bottom: 18px; }
.pd-controls { display: flex; gap: 12px; justify-content: center; }
.pd-controls + .pd-controls { margin-top: 10px; }
#pd-count { text-align: center; margin-top: 14px; }